Measuring instrument



Apr. 24, 19,23.

E FUCHS 'MEAsruRING INSTRUMENT Filed April 25 1918 7 Patented Apr. 24, 1923.

UNIT ED: r STA/res Param 'orme y ERNEST FUCHS, OF PARIS, FRANCE, ASSIGNOR TO LOUIS RENAULT, 0F BILLANCOURT, DEPARTMENT OF SEINE, FRANCE.

MEASURING INSTRUMENT.

Application led April 25, 1918. Serial No. 230,821.

To all whom it may concern:

Be it known that I, ERNEST FUCHS, re-

siding at 111 Boulevard Exelmans, at Paris, j

Department of the Seine, France, citizen of the French Republic, haveinve-nted certain new and useful Improvements in Measuring Instruments; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. t

This invention relates to measuring 1nstruments, such as calipers and the like, and particularly to means for rendering the same capable of testing aplurality of dimensions.

In the drawing:

Fig. 1 is an elevation, partly in section, of one embodiment of my invention applied to calipers of the fork type;

Fig. 2 is a similar view of a modilication;

Fig. 3 is an elevation of a further modiiication; y

Fig. 3a is a detail view, showing a modilication of the stepped cam shown in Fig. 3.

Fig. et is a view of a plug caliper with the invention applied thereto; and

Fig. 5 is a similar view of a modified form applied to the calipers of the plug type.

. The body of the calipers in the several iigures is indicated by the reference character 1.

In Fig. l the ball eelers 2 are carried' iny sockets in the body 1 and the distance between these balls is variedby a series of blades 4 adjacent to each ball, which blades are `pivoted at 3. When the blades are turned to position the ballsthe frame of` the instrument provides abutments for the blades on the sides opposite to those contacting with the balls. These blades are each of a known thickness and, therefore, one or more may be swung on the pivot 3 to adjust the balls 2.

In Fig. 2 the balls are replaced by cylindrical eelers 5, which are normally pushed apart by springs 6. In this form the blades 4 are pivoted at 3 and are operated in the same manner as described in connection with Fig. 1, the blades being swung in behind the feelers, separately or collectively.y

In Fig. 3 the eelers 5 are urged away from each other by springs 6 and the step cams 7 are pivoted at 8. These cams may be swung behind the eelers 5 so as to cause them to project to various degrees, the degree depending upon the thickness of the portion of the cam behind the feelers. On the outer end of each of the eelers 5` is a pin adapted to engage a suitably shaped slot in the body of the instrument to provide a bayonet joint. Either of the eelers can be moved outwardly against the action of its spring and held stationary by its bayonet connection to meet certain measuring requirements. In lieu of the cam illustrated in Fig. 3, such a cam as illustrated in Fig. 3- may be used,the cam surface being indif cated by the reference character 6. As the operation is obvious, this will not be described in detail.

In Fig. f1 a caliper for inside measurements is shown. The balls 2 are inserted in sockets inthe body l and are urged outwardly by blades 1i which are pivoted at 3 and operate as blades 4 which have been previously described.

In Fig. 5 calipers for inside measurements are illustrated and in this Jform the feelers 5 are urged inwardly by springs 6". These feelers can be moved outwardly against the action of their springs by a cam 7, which is pivoted at 8 and operates similarly to cam 7 lpreviously. described.

What I claim is: p

1. A measuring instrument, having a pair of oppositely disposed and spaced apart feelers and a step by step spacing means pivoted to the instrument to be turned between an end of one of the eelers and an abutment on the instrument for moving one of said feelers relatively to the other to regulate the distance between the same.

2. A vmeasuring instrument, having a pair of oppositely disposed spaced feelers and a stepped-cam associated with each eeler adapted to be interposed between the inner ends of said feelers and the adjacent portions of said instrument Jfor regulating the distance between said eelers to various degrecs.

measuring instrument, having oppo- .sitely spaced jaws, a feeler adjustably In testimony whereofIafX mysignature,

mounted in one .of said jaws, e series of in presence of two witnesses. step by step spaclng elements adapted to be interposed between the inner end of said ERNEST FUCHS 5 feeler and the adjacent portion of sald in- Witnesses:

strument for regulating the distance between CHAS. P. PnnssLY,

said jaws. v A. BERT LOLLE. 

